Steam iron



FIG. 1 is a front perspective view of a steam iron showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines shown in the drawings represent portions of the steam iron that form no part of the claimed design. 

The ornamental design for a steam iron, as shown and described. 